with getting a switch and playing a lot of PS4 games I have not play any retro stuff this year. So I guess the oldest game is Europa Universalis 4 which came out in 2013.... Closest I have gotten to retro is the myriad of 2D sequences in SMO.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut